Register-hook.



N. 873,043.v PATBNTED DEC. 10. 1907.

I W. AL. HAMILTON.

' REGISTER HOOK.

APPLIGATION :FILED Nov. 24. 1906.

a sums-snm 1.

www. m

PATBNTED bm. 1b, 1907.4

W. L. HAMILTON. REGISTER HOOK. APPLIGATION FILED Nov. 2 4.19o6.

2 SHEETS-SHEET 2.

WILLIAM L. HAMILTON, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed November-24, 1906. Serial No. 344.900.

To all whom it may concern:

Be it known that I, WILLIAM L. HAMIL- TON, a citizen of the United States, residing at 57 02 Union avenue, in the city of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Register-Hooks, of which the following is a specification.

My improvement relates to that class of tools known as hooks and base blocks used by printers to securely support printing plates in position in a form made up for printing purposes.

The object of my invention is to provide a hook of simple construction; of easier and more extended adjustment; adapted for holding the greatest variety .of printing plates; that can be combined with the base blocks of any size on which the plates are supported and in which the clutch screw can be operated with a lever pin and a ratchet (a tool in common use by pressmen.)

The manner in which I accomplish my object is described in the following specification and illustrated in the accompanying drawings in which:

Figure lis a plan view showing six of my hooks in position holding a printing plate supported on ordinary printers blocks. Fig. 2- is an end elevation showing the form of the body of my hook, end of screw and clutch and lever pin. Fig. 3- is a plan view showing the top of the clutch, part of the screw and the center bearing groove therein; part of the main body being broken away. Fig. 4- is a cross sectional view on line 4- 4, Fig. 3- showing the curved side in the body adapted to project into the central bearing groove of the screw. Fig. 5- is a longitudinal central sectional view on the-line 5 5, Fig. 3. Fig. 6 is a perspective view of the clutch removed from Vthe body part of the hook. Fig. 7-` is a .plan view of my combined hook and base block; this view is illustrative of the varied surface sizes adapted for the various sized plates that may be used in one form, Fig. 8-- is an end elevation of a part of one of the base blocks. Fig. 9- is a cross section on the line 9- 9, Fig. 7, showing the key-way in the base block and the locking key in the key-way to hold the screw in position. Fig. 10- is a perspective view of the key and screw.

ig 1 1 is a view of the locking key.

printing In the drawings A indicates the body of the hook which may be of any suitable material and size for the use intended. Through the longitudinal center of this body is a channel A1 having a same circular bottom,- A2 and open top A3. In the upper part of this channel both sides are formedinto corresponding longitudinal guide ways A4 and A5. This channel and these guide ways extend the full length of the body A. Extending across the center of the length of the channel A1 and projecting above the circular .bottom A2 1s a curved rib A6 shown in Figs. 4 and 5. integral part of the body A, or be aflixed therein. One end of the body A is cut down and forms a ledge A7. Within the channel A1 and extending the full length thereof is a screw shaft B. The surface B1 of this shaft is threaded from end to end. In the center of the length of this shaft is an annular groove B2 adapted to lit the projecting rib A6 in the body A, as shown in Figs. 4 and 5. In the threaded surface of the shaft are longitudinal parallel grooves B3 shown in the end view, Figs. 3 and 10. The threaded surface of this shaft is of a diameter adapted to permit said shaft to be inserted endwise into the channel A1 over the rib A, and to be lowered into place with said rib in the groove B2 in which position it is free to bevrevolved, but cannot be moved longitudinally. A clutch O, constructed with external bearing surfaces C1 and C2 corresponding with and adapted to fit the guide ways A1 and A5 in the body A, is adapted to be inserted in said body and to slide freely in said bearing surfaces. The underside O3 of this clutch is curved and threaded as shown in Figs. 5 and 6 to correspond with the threaded surface of the shaft B and is thereby adapted to fit into the thread on said shaft when said clutch is inserted in said body and to be moved therein by the rotation of said shaft. Forming part of said clutch and extending transversely to the bearing surfaces O1 and C2 is a jaw C4. This jaw is located at one end of the clutch and has an inward beveled face O5 shown in Figs. 5 and 6.

The top surface O6 of the clutch is adapted to correspond with the height of the top A8 of the body A. and form with it a level surface. The outer end C7 is narrowed as shown in Figs. 2 and 3.

This rib may be an When constructed as described and illustrated in the drawings, the hook is put together and used as follows: The shaft is inserted endwise into the body A and placed over the side in the bottom thereof. @ne end of the clutch C is then inserted in the bearing surfaces in the body and'in contact with the threaded surface of the shaft, which is then revolved in the right direction and the clutch is thereby drawn into the body as shown in Fig. 8. Several of these hooks are placed in position in the form in contact with the ordinary supporting blocks used for printing plates, indicated by yA, Fig. 1 (and backed up by other blocks inserted between the hooks and chase not shown) so that the edges of the printing plate will be over the top C of the clutch. rI`he shaft B is then rotated and the clutch ismoved rapidly either way in the main body by a hand rack moved along the ledge A7 the teeth of said rack entering the grooves B3 and thereby rotating the shaft, and by lever pin E which is adapted to be inserted in the grooves B3, as 'shown in Fig. 2. The beveled face C5 of the jaw C4 is thereby firmly pressed against the edge of the printing plate as shown in Figs. 1 and 7.

The combination of hook and base block is accomplished by increasing the surface size of the body A, and extending the channels A1 and guide ways A4 and A5 the full length and width of the body A, increasing the number of channels in proportion to the size of the body, from side to side at right angles as shown in Fig. 7. In these hook and ba'se blocks there are no ribs AG across the bottom of the channels, in which the screw shaft B can'be moved from end to end. For the purpose of securing the screw in the po.-

sition required in the channel, a key F,

Fig. 11, is inserted in key-ways F1, constructed at certain distancesin the block through the guide-ways and sides of the channels to a depth adapted to allow the bottom ends of the key to engage the horizontal center of the grooved part B2 of the screw B as shown in Figs. 8 and 9 in which 'position the screw B is securely held in position and the clutch C is free to be moved over the top of the key F, as shown in Fig. 9 as the screw is rotated. The screw, when in position in the channel, rests on the bottom as shown in Figs. 8 and 9, and together with the clutch can be moved to any one of the key-ways and be secured in position close to the edge of the plate D by the insertion of the key-a partial rotation of the screw by the lever E locking the clutch and plate. The ledge A7 is made in the ends of the main body A to permit of the operation of the j screw by a hand rack moved along said ledge,

and by the lever pin E for the final adjustment of the clutch and when the position of the plate D and the clutch C requires the jaw CL to be at the extreme end of the body A, as shown in Fig. 3.

What I claim and desire to secure by Letters Patent is:

1. In a device of the kind described the rectangular body, said body having a transverse ledge at one end, a cylindrical channel extending longitudinally therethrough and longitudinal parallel guideways forming the open top of said channel, the shaft insertible in said channel, the surface of said shaft being threaded the full length and channeled longitudinally by a series of parallel channels extending the full length of said shaft, and having a central annular channel; the projection in said body adapted to enter said annular channel in said shaft; the clutch slidably supported in said guideways, said clutch having an arched and threaded under surface adapted to mesh into the threaded surface of said shaft, and thereby adapted to be moved from end to end of said body by the rotation of said shaft.

2. In a device of the kind described, the combination with the main body, said body having a transverse ledge at one end, a cylindrical channel extending longitudinally therethrough and longitudinal parallel guideways; of a shaft insertible in said channel,

the surface of said shaft being threaded the full length, channeled from end to end with a series of parallel channels and having an annular channel in the central part adapted to admit a projection in said cylindrical channel adapted to prevent a lateral movement of said shaft in said body, and a clutch insertible in said guideways'adapted to be engaged and moved therein by the rotation of said shaft.

3. In a device of the kind described, the combination with the main body having a transverse ledge at one end, a cylindrical channel extending therethrough and parallel guideways, and a shaft insertible in said channel, the surface of said shaft being threaded and channeled longitudinally with a plurality of parallel channels and having an annular channel; of a projection in said cylindrical channel adapted to enter said annular channel in said shaft and to thereby prevent its lateral movement in said main body, and a clutch slidably supported in said guideways, said clutch being adapted to engage said shaft and be moved by its rotation in said body.

4. In a device of the kind described, the combination with the main body, the shaft revolubly supported therein, the surface of said shaft being threaded and channeled the full length, and means in said body adapted to prevent the lateral movement of said shaft in said body; of a clutch slidably supported in said body, said clutch having an arched under surface said surface being threaded face of said shaft, said clutch being thereby adapted to be moved from end to end of said body by the rotation of said screw.

5. A register hook having a rectangular body, a cylindrical channel extending through said body, the open parallel sides of said channel forming guideWays adapted to hold a clutch; a surface threaded shaft insertible and revoluble in said channel, said shaft having surface parallel channels adapted to admit the end of an operating leverand to be thereby rotated in said body7 and an annular groove in said shaft adapted to admit means in said body whereby the lateral position of said shaft in said body is iiXed a Clutch slidably supported in said guideways in which it is free to be moved from end to end of said body, said clutch having an arched under surface7 said surface being threaded and thereby adapted to mesh into the threaded surface of said shaft and to be moved in said guideways by the rotation of said shaft.

WILLIAM L. HAMILTON.

Witnesses:

JOSEPH STAAB, THOMAS J. MORGAN. 

